A mortar round located in a UPS package addressed to a Clearlake resident was found by an employee at the UPS customer service building located at 1275 Craig Ave. in Lakeport, according to Lakeport Police Lt. Jason Ferguson.

The employee removed the package from the building and took it to a field nearby, Ferguson said.

The area was then cordoned off and the bomb squad disarmed the round by use of controlled-detonation, which caused a loud boom in the early afternoon.

The mortar round was determined to be inert and an investigation of the incident by LPD is ongoing.